The socialisation period in puppies between 3 and 14 weeks is a critical window that shapes behavioural responses to the world for life. Poor socialisation is a primary cause of fear-related welfare problems in adult dogs.
Fear and anxiety are experienced as aversive states that reduce quality of life significantly. Dogs with generalised anxiety spend much of their lives in a state of apprehension that affects feeding, play, sleep, and social interaction. Fear-based aggression creates dangerous situations that frequently result in the dog being euthanised. The suffering caused by a poor socialisation window can last the entire lifetime of the animal, making early intervention among the highest-impact welfare interventions available.